• Winter visitors watching geysers erupting

    Yellowstone

    National Park ID,MT,WY

Hot Springs and How They Work

Emerald Spring glows green.

Emerald Spring

Hot springs with names like Morning Glory, Grand Prismatic, Abyss, Emerald, and Sapphire, glisten like jewels in a host of colors across the park's harsh volcanic plain. They are the most common hydrothermal features in the park.

Their plumbing has no constrictions. Superheated water cools as it reaches the surface, sinks, and is replaced by hotter water from below. This circulation, called convection, prevents water from reaching the temperature needed to set off an eruption. [View the anatomy of a hot spring.]

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